php - how to use MySQL like for searching exact a value -

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i have string stored table 'tbl_route' column named 'route_nos'.

the string looks 3,4,7,8,9,10,11,14,16,20

i searching 2 number whole string using mysql operator.

$nospos="1";  $qr=mysql_query("select * tbl_route routes_nos '% $nospos %'");

but when query executes returns rows. there no 1 present in string. found takes partial match of no present in 11 or 14 or 16. need exact search.. how possible?

use 

$qr=mysql_query("select * tbl_route find_in_set($nospos, routes_nos) ");

refer doc here


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